If you're already used to lifting weights, training until you can't do another rep gives you about the same muscle growth as stopping a few reps short—so you don't have to push to absolute exhaustion to build muscle.

If you lift weights until you can't do another rep, or stop just before failure, your thigh muscles grow about the same amount after eight weeks — but stopping short feels less exhausting each time.

You don’t need to push to absolute failure to grow your thigh muscles — stopping just before failure works just as well and leaves you less tired, making it easier to train consistently.

Even doing a huge number of leg sets—over 50 a week—didn’t make anyone’s muscles shrink, which means there might be a very high limit to how much training your muscles can handle without losing size.

You don’t need to push your muscles to absolute exhaustion to grow them—working them pretty hard (but not all the way to failure) might give you just as much muscle growth as going all out.

If you're already someone who lifts weights, doing light weights twice a week until you can't do more reps can make your muscles bigger and stronger in just 8 weeks.